{"id":111,"date":"2024-05-08T16:53:11","date_gmt":"2024-05-08T16:53:11","guid":{"rendered":"https:\/\/www.merckvaccines.com\/vaqta\/?page_id=111"},"modified":"2026-03-26T09:16:36","modified_gmt":"2026-03-26T09:16:36","slug":"adult-dosing-schedule","status":"publish","type":"page","link":"https:\/\/www.merckvaccines.com\/vaqta\/adult-dosing-schedule\/","title":{"rendered":"Adult flexible dosing schedule"},"content":{"rendered":"<link rel='stylesheet' id='vivid360-spacer-css-css' href='https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/themes\/cex-wpvip-mhh-merck-vivid360-theme-1-12\/blocks\/spacer\/css\/style.min.css?ver=1766071753' media='all' \/>\n\n<div style=\"background-color:transparent;--desktop-spacer:2px;--tablet-spacer:2px;--mobile-spacer:8px\" class=\"wp-block-vivid360-spacer vivid360-spacer-desktop vivid360-spacer-tablet vivid360-spacer-mobile\"><\/div>\n\n\n<link rel='stylesheet' id='vivid360-hero-css-css' href='https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/themes\/cex-wpvip-mhh-merck-vivid360-theme-1-12\/blocks\/hero\/css\/style.min.css?ver=1766071753' media='all' \/>\n\n<div id=\"\" class=\"wp-block-vivid360-hero\"><div class=\"vivid360-hero-container align-left align-middle ratio-70-30 horizontal mobile text-align-left has-primary-dark-color is-default-style mobile-is-default-style mobile-uses-custom-styles\" style=\"border-width:0;border-style:solid;border-top-left-radius:0;border-top-right-radius:0;border-bottom-right-radius:0;border-bottom-left-radius:0;--minHeight:244px;--mobileMinHeight:154px\"><div class=\"wide_screens hidden\" data-value=\"stretch\"><\/div><picture><source media=\"(max-width: 767px)\" srcset=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/DA_Flexible-Dosing-Schedule_Adults_Banner_1128px@2x-2.png?w=767\"\/><source media=\"(min-width: 768px) and (max-width: 1024px)\" srcset=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/DA_Flexible-Dosing-Schedule_Adults_Banner_1128px@2x-2.png?w=1024\"\/><source media=\"(min-width: 1025px) and (max-width:1440px)\" srcset=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/DA_Flexible-Dosing-Schedule_Adults_Banner_1128px@2x-2.png?w=1440\"\/><img decoding=\"async\" width=\"2257\" height=\"485\" loading=\"lazy\" data-src=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/DA_Flexible-Dosing-Schedule_Adults_Banner_1128px@2x-2.png?w=1488\" src=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/DA_Flexible-Dosing-Schedule_Adults_Banner_1128px@2x-2.png?w=1488\" alt=\"\" class=\"hero-image\" style=\"--desktop-focal-x:50%;--desktop-focal-y:50%;--mobile-focal-x:50%;--mobile-focal-y:50%;--tablet-focal-x:50%;--tablet-focal-y:50%\"\/><div class=\"capoverlay-container-mobile right-bottom show  hide_mobile isMobileOverlayChecked label\" style=\"--top-margin:;--bottom-margin:;--left-margin:;--right-margin:\"><div class=\"overlay-caption-schema\">Actor Portrayal<\/div><\/div><\/picture><div class=\"hero-wrapper\"><div class=\"hero-content\"><h1 style=\"--headlineFontSize:36px;--headlineFontSizeTablet:36px;--headlineFontSizeMobile:24px;--headlineLineHeight:45px;--headlineLineHeightTablet:45px;--headlineLineHeightMobile:30px\" class=\"hero-title fontWeightRegular\"><strong><strong><strong><strong><strong>VAQTA\u00ae (Hepatitis A Vaccine, Inactivated) \u2028adult flexible dosing schedule<\/strong><\/strong><\/strong><\/strong><\/strong><\/h1><p class=\"hero-description\"><\/p><div class=\"hero-btn-group\">\n\n<p><\/p>\n\n<\/div><div class=\"hero-caption\"><\/div><\/div><\/div><\/div><div class=\"hero-caption-2mobile\"><\/div><\/div>\n\n\n\n<div style=\"background-color:transparent;--desktop-spacer:8px;--tablet-spacer:8px;--mobile-spacer:36px\" class=\"wp-block-vivid360-spacer vivid360-spacer-desktop vivid360-spacer-tablet vivid360-spacer-mobile\"><\/div>\n\n\n<link rel='stylesheet' id='vivid360-heading-css-css' href='https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/themes\/cex-wpvip-mhh-merck-vivid360-theme-1-12\/blocks\/heading\/css\/style.min.css?ver=1766071753' media='all' \/>\n\n<div class=\"vivid360-heading default-hcp-fontsize default-hcp-tablet-fontsize default-hcp-mobile-fontsize\" id=\"a7bc515a2-88ec-4769-a3c6-758566de41d3\"><h2 class=\"has-primary-dark-color content-width fontWeightRegular\" style=\"--desktopFontSize:var(--h2FontSizeDesktop);--tabletFontSize:var(--h2FontSizeDesktop);--mobileFontSize:var(--h2FontSizeMobile);--desktopLineHeightSize:var(--h2LineHeightDesktop);--tabletLineHeightSize:var(--h2LineHeightDesktop);--mobileLineHeightSize:\" id=\"\"><strong>Available as a prefilled syringe<\/strong><\/h2><\/div>\n\n\n\n<div style=\"background-color:transparent;--desktop-spacer:8px;--tablet-spacer:8px;--mobile-spacer:16px\" class=\"wp-block-vivid360-spacer vivid360-spacer-desktop vivid360-spacer-tablet vivid360-spacer-mobile\"><\/div>\n\n\n<link rel='stylesheet' id='vivid360-image-css-css' href='https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/themes\/cex-wpvip-mhh-merck-vivid360-theme-1-12\/blocks\/image\/css\/style.min.css?ver=1766071753' media='all' \/>\n\n<div class=\"wp-block-vivid360-image img-container\"><figure class=\"wp-block-vivid360-image is-style-default has-mobile-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/VAQTA-Adult-Syringe_IMAGE.png\" alt=\"Prefilled Syringe of VAQTA\u00ae (Hepatitis A Vaccine, Inactivated) for Adults\" class=\"wp-image-3189  style-noshadow deskHeightAuto  \" width=\"255\" height=\"56\" style=\"height:56px;width:255px\" srcset=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/VAQTA-Adult-Syringe_IMAGE.png 1020w, https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/VAQTA-Adult-Syringe_IMAGE.png?resize=300,65 300w, https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/VAQTA-Adult-Syringe_IMAGE.png?resize=768,167 768w\" sizes=\"auto, (max-width: 255px) 100vw, 255px\" \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/VAQTA-Adult-Syringe_IMAGE.png\" alt=\"Prefilled Syringe of VAQTA\u00ae (Hepatitis A Vaccine, Inactivated) for Adults\" class=\"wp-image-3189  style-noshadow mobile-image mobHeightAuto mobWidthAuto \" width=\"191\" height=\"42\" title=\"\" style=\"height:42px;width:191px\" srcset=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/VAQTA-Adult-Syringe_IMAGE.png 1020w, https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/VAQTA-Adult-Syringe_IMAGE.png?resize=300,65 300w, https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/VAQTA-Adult-Syringe_IMAGE.png?resize=768,167 768w\" sizes=\"auto, (max-width: 191px) 100vw, 191px\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-columns is-not-stacked-on-mobile is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"column-wrapper _b8b82f46-48e9-45b2-86ea-62d59c9b9a9b\"><style>\n\t\t\t\t@media (min-width: 1024px) {\n\t\t\t\t\t.column-wrapper {\n\t\t\t\t\t\tdisplay: contents;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t@media (max-width: 1024px) {\n\t\t\t\t\t#block-b8b82f46-48e9-45b2-86ea-62d59c9b9a9b,\n\t\t\t\t\t._b8b82f46-48e9-45b2-86ea-62d59c9b9a9b {\n\t\t\t\t\t\tflex-basis: 30% !important;display: unset !important;\n\t\t\t\t\t\t\n\t\t\t\t\t}\n\t\t\t\t\t.wp-block-columns:not(.is-not-stacked-on-mobile)>.column-wrapper {\n\t\t\t\t\t\tflex-basis: 100% !important;\n\t\t\t\t\t}\n\t\t\t\t\t.column-wrapper .wp-block-column {\n\t\t\t\t\t\torder: inherit;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t@media (max-width: 767px) {\n\t\t\t\t\t#block-b8b82f46-48e9-45b2-86ea-62d59c9b9a9b,\n\t\t\t\t\t._b8b82f46-48e9-45b2-86ea-62d59c9b9a9b {\n\t\t\t\t\t\tflex-basis: 50% !important;display: unset !important;\n\t\t\t\t\t\t\n\t\t\t\t\t}\n\t\t\t\t\t.column-wrapper .wp-block-column {\n\t\t\t\t\t\torder: inherit;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t<\/style><div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:10%\">\n<div class=\"paragraph-wrapper\"><div class=\"_f710f5e0-58d9-45c3-a6ab-6d5423b7082d \" id=\"\"><p class=\"has-text-align-left has-small-font-size\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">Not shown actual size<\/mark><\/p><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"column-wrapper _1d35e6a0-c550-44b5-a20e-a8ba398f9d83\"><style>\n\t\t\t\t@media (min-width: 1024px) {\n\t\t\t\t\t.column-wrapper {\n\t\t\t\t\t\tdisplay: contents;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t@media (max-width: 1024px) {\n\t\t\t\t\t#block-1d35e6a0-c550-44b5-a20e-a8ba398f9d83,\n\t\t\t\t\t._1d35e6a0-c550-44b5-a20e-a8ba398f9d83 {\n\t\t\t\t\t\tflex-basis: 30% !important;display: unset !important;\n\t\t\t\t\t\t\n\t\t\t\t\t}\n\t\t\t\t\t.wp-block-columns:not(.is-not-stacked-on-mobile)>.column-wrapper {\n\t\t\t\t\t\tflex-basis: 100% !important;\n\t\t\t\t\t}\n\t\t\t\t\t.column-wrapper .wp-block-column {\n\t\t\t\t\t\torder: inherit;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t@media (max-width: 767px) {\n\t\t\t\t\t#block-1d35e6a0-c550-44b5-a20e-a8ba398f9d83,\n\t\t\t\t\t._1d35e6a0-c550-44b5-a20e-a8ba398f9d83 {\n\t\t\t\t\t\tflex-basis: 50% !important;display: unset !important;\n\t\t\t\t\t\t\n\t\t\t\t\t}\n\t\t\t\t\t.column-wrapper .wp-block-column {\n\t\t\t\t\t\torder: inherit;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\t<\/style><div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:70%\">\n<div class=\"paragraph-wrapper\"><div class=\"_deb84798-c9ae-4a27-996a-95e98db56ec3 \" id=\"\"><p class=\"has-text-align-left has-small-font-size\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-black-color\">NDC 0006-4096-02<\/mark><\/p><\/div><\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"vivid360-heading default-hcp-fontsize default-hcp-tablet-fontsize default-hcp-mobile-fontsize\" id=\"a96c7aa26-f582-4c71-9252-3b4487590212\"><h2 class=\"has-primary-dark-color content-width fontWeightRegular mb-0\" style=\"--desktopFontSize:var(--h2FontSizeDesktop);--tabletFontSize:var(--h2FontSizeDesktop);--mobileFontSize:var(--h2FontSizeMobile);--desktopLineHeightSize:var(--h2LineHeightDesktop);--tabletLineHeightSize:var(--h2LineHeightDesktop);--mobileLineHeightSize:\" id=\"\"><strong>Flexible dosing window: VAQTA offers 6 more months compared to <em>Havrix<sup>*,1<\/sup><\/em><\/strong><\/h2><\/div>\n\n\n\n<div style=\"background-color:transparent;--desktop-spacer:16px;--tablet-spacer:16px;--mobile-spacer:24px\" class=\"wp-block-vivid360-spacer vivid360-spacer-desktop vivid360-spacer-tablet vivid360-spacer-mobile\"><\/div>\n\n\n\n<p><strong>VAQTA offers a broader window for the 2nd dose<\/strong><\/p>\n\n\n<link rel='stylesheet' id='vivid360-columns-css-css' href='https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/themes\/cex-wpvip-mhh-merck-vivid360-theme-1-12\/blocks\/columns\/css\/style.min.css?ver=1766071753' media='all' \/>\n\n<div class=\"wp-block-vivid360-columns vivid360-columns not-stacked-on-tablet mb-0\" style=\"--desktopPadding:;--tabletPadding:;--mobilePadding:;--gutterWidth:1rem;--mobGutterWidth:1rem;border-style:;border-radius:0;border-width:0\"><link rel='stylesheet' id='vivid360-column-css-css' href='https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/themes\/cex-wpvip-mhh-merck-vivid360-theme-1-12\/blocks\/column\/css\/style.min.css?ver=1766071753' media='all' \/>\n\n<div class=\"wp-block-vivid360-column is-vertically-aligned-bottom vivid360-column\" style=\"--tabletColumnWidth:100%;--mobileColumnWidth:100%;--tabletColumnOrder:;--mobileColumnOrder:;--colDeskPadding:;--colTabPadding:;--colMobPadding:;flex-basis:100%;border-style:;border-radius:0;border-width:0\">\n<div class=\"wp-block-vivid360-image img-container\"><figure class=\"wp-block-vivid360-image is-style-default has-mobile-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1021\" height=\"171\" src=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/VAQTA_2nd-Dose-Harvix_CHART_RGB_MAX_DSKTP_LIVE_v2@2x.png\" alt=\"\" class=\"wp-image-3190  style-noshadow deskHeightAuto deskWidthAuto \" style=\"height:171px;width:1021px\" srcset=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/VAQTA_2nd-Dose-Harvix_CHART_RGB_MAX_DSKTP_LIVE_v2@2x.png 1021w, https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/VAQTA_2nd-Dose-Harvix_CHART_RGB_MAX_DSKTP_LIVE_v2@2x.png?resize=300,50 300w, https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/VAQTA_2nd-Dose-Harvix_CHART_RGB_MAX_DSKTP_LIVE_v2@2x.png?resize=768,129 768w\" sizes=\"auto, (max-width: 1021px) 100vw, 1021px\" \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/VAQTA_2nd-Dose-Harvix_CHART_RGB_MAX_MOBILE_v2@2x.png\" alt=\"\" class=\"wp-image-3191  style-noshadow mobile-image mobHeightAuto mobWidthAuto \" width=\"565\" height=\"144\" title=\"\" style=\"height:144px;width:565px\"\/><\/figure><\/div>\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-small-font-size\">*<em>Havrix <\/em>is a registered trademark of GSK.<\/p>\n\n\n\n<div style=\"background-color:transparent;height:8px\" class=\"wp-block-vivid360-spacer vivid360-spacer spacer-8\"><\/div>\n\n\n\n<div class=\"vivid360-heading\" id=\"a79091d42-75cd-4754-909b-abd12fba0742\"><h3 class=\"has-black-color content-width fontWeightRegular\" style=\"--desktopFontSize:var(--h3FontSizeDesktop);--tabletFontSize:var(--h3FontSizeDesktop);--mobileFontSize:var(--h3FontSizeMobile);--desktopLineHeightSize:var(--h3LineHeightDesktop);--tabletLineHeightSize:var(--h3LineHeightDesktop);--mobileLineHeightSize:\" id=\"\"><strong>In an interchangeability study, VAQTA was administered as the second dose following a first dose of another hepatitis A vaccine.<\/strong><\/h3><\/div>\n\n\n\n<div style=\"background-color:transparent;--desktop-spacer:8px;--tablet-spacer:8px;--mobile-spacer:24px\" class=\"wp-block-vivid360-spacer vivid360-spacer-desktop vivid360-spacer-tablet vivid360-spacer-mobile\"><\/div>\n\n\n\n<p>VAQTA as a second dose showed similar seropositivity after 4 weeks.<sup>a,b<\/sup><\/p>\n\n\n\n<div style=\"background-color:transparent;height:8px\" class=\"wp-block-vivid360-spacer vivid360-spacer spacer-8\"><\/div>\n\n\n\n<div class=\"wp-block-columns ml-0 mb-0 is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column ml-0 mr-0 mb-0 is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:15%\"><\/div>\n\n\n\n<div class=\"wp-block-column ml-0 mr-0 mt-0 mb-0 is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:30%\">\n<div class=\"wp-block-vivid360-image\"><div class=\"img-container mr-0  ml-0 mt-0 mb-0\"><figure class=\"wp-block-vivid360-image is-style-default has-mobile-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"312\" height=\"158\" src=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/99.3-Seropositivity-Rate_HavrixHavrix_BOX-VISUAL@2x.png\" alt=\"HAVRIX Combined With HAVRIX as a Second Dose Showed a 99.3% Seropositivity Rate\" class=\"wp-image-3192  style-noshadow deskHeightAuto deskWidthAuto \" style=\"height:158px;width:312px\" srcset=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/99.3-Seropositivity-Rate_HavrixHavrix_BOX-VISUAL@2x.png 312w, https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/99.3-Seropositivity-Rate_HavrixHavrix_BOX-VISUAL@2x.png?resize=300,152 300w\" sizes=\"auto, (max-width: 312px) 100vw, 312px\" \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/99.3-Seropositivity-Rate_HavrixHavrix_BOX-VISUAL@2x_668427.png\" alt=\"HAVRIX Combined With HAVRIX as a Second Dose Showed a 99.3% Seropositivity Rate\" class=\"wp-image-3193  style-noshadow mobile-image mobHeightAuto  \" width=\"234\" height=\"119\" title=\"\" style=\"height:119px;width:234px\" srcset=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/99.3-Seropositivity-Rate_HavrixHavrix_BOX-VISUAL@2x_668427.png 312w, https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/99.3-Seropositivity-Rate_HavrixHavrix_BOX-VISUAL@2x_668427.png?resize=300,152 300w\" sizes=\"auto, (max-width: 234px) 100vw, 234px\" \/><\/figure><\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:5%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:30%\">\n<div class=\"wp-block-vivid360-image\"><div class=\"img-container ml-0 mr-0 mt-0 \"><figure class=\"wp-block-vivid360-image is-style-default has-mobile-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"312\" height=\"158\" src=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/99.7-Seropositivity-Rate_HavrixVaqta_BOX-VISUAL@2x_6af80f.png\" alt=\"HAVRIX Combined With VAQTA\u00ae (Hepatitis A Vaccine, Inactivated) as a Second Dose Showed a 99.7% Seropositivity Rate\" class=\"wp-image-3196  style-noshadow deskHeightAuto deskWidthAuto \" style=\"height:158px;width:312px\" srcset=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/99.7-Seropositivity-Rate_HavrixVaqta_BOX-VISUAL@2x_6af80f.png 312w, https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/99.7-Seropositivity-Rate_HavrixVaqta_BOX-VISUAL@2x_6af80f.png?resize=300,152 300w\" sizes=\"auto, (max-width: 312px) 100vw, 312px\" \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/99.7-Seropositivity-Rate_HavrixVaqta_BOX-VISUAL@2x.png\" alt=\"HAVRIX Combined With VAQTA\u00ae (Hepatitis A Vaccine, Inactivated) as a Second Dose Showed a 99.7% Seropositivity Rate\" class=\"wp-image-3195  style-noshadow mobile-image mobHeightAuto  \" width=\"234\" height=\"119\" title=\"\" style=\"height:119px;width:234px\" srcset=\"https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/99.7-Seropositivity-Rate_HavrixVaqta_BOX-VISUAL@2x.png 312w, https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/uploads\/sites\/163\/2026\/03\/99.7-Seropositivity-Rate_HavrixVaqta_BOX-VISUAL@2x.png?resize=300,152 300w\" sizes=\"auto, (max-width: 234px) 100vw, 234px\" \/><\/figure><\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:15%\"><\/div>\n<\/div>\n\n\n\n<p class=\"has-primary-dark-color has-text-color\">VAQTA can be administered <strong>6 to 12 months<\/strong> following a first dose of <em>Havrix*<\/em>.<\/p>\n\n\n\n<div style=\"background-color:transparent;--desktop-spacer:8px;--tablet-spacer:8px;--mobile-spacer:16px\" class=\"wp-block-vivid360-spacer vivid360-spacer-desktop vivid360-spacer-tablet vivid360-spacer-mobile\"><\/div>\n\n\n\n<div class=\"vivid360-heading default-hcp-fontsize default-hcp-tablet-fontsize default-hcp-mobile-fontsize\" id=\"afbd687ef-3c5a-43ab-a92e-448818dd3845\"><h2 class=\"has-primary-dark-color content-width fontWeightRegular\" style=\"--desktopFontSize:var(--h2FontSizeDesktop);--tabletFontSize:var(--h2FontSizeDesktop);--mobileFontSize:var(--h2FontSizeMobile);--desktopLineHeightSize:var(--h2LineHeightDesktop);--tabletLineHeightSize:var(--h2LineHeightDesktop);--mobileLineHeightSize:\" id=\"\"><strong>Clinical study design<\/strong><\/h2><\/div>\n\n\n\n<div style=\"background-color:transparent;--desktop-spacer:8px;--tablet-spacer:8px;--mobile-spacer:24px\" class=\"wp-block-vivid360-spacer vivid360-spacer-desktop vivid360-spacer-tablet vivid360-spacer-mobile\"><\/div>\n\n\n\n<p><sup>a<\/sup>A randomized, double-blind clinical study conducted in adult patients 18 years of age and older evaluated the immune response to a booster dose of VAQTA and <em>Havrix<\/em> given 6 or 12 months following an initial dose of <em>Havrix<\/em>.<\/p>\n\n\n\n<div style=\"background-color:transparent;--desktop-spacer:8px;--tablet-spacer:8px;--mobile-spacer:24px\" class=\"wp-block-vivid360-spacer vivid360-spacer-desktop vivid360-spacer-tablet vivid360-spacer-mobile\"><\/div>\n\n\n\n<p><sup>b<\/sup><em>Havrix<\/em> (1440 EL. U), VAQTA (50 U).<\/p>\n\n\n\n<div style=\"background-color:transparent;height:8px\" class=\"wp-block-vivid360-spacer vivid360-spacer spacer-8\"><\/div>\n\n\n\n<p class=\"has-small-font-size\"><em>*Havrix is a registered trademark of GSK.<\/em><\/p>\n\n\n\n<div style=\"background-color:transparent;height:8px\" class=\"wp-block-vivid360-spacer vivid360-spacer spacer-8\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top ml-0 is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\"><link rel='stylesheet' id='vivid360-card-css-css' href='https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/themes\/cex-wpvip-mhh-merck-vivid360-theme-1-12\/blocks\/card\/css\/style.min.css?ver=1773241827' media='all' \/>\n\n<div id=\"\" class=\"wp-block-vivid360-card a9bbacc29-0eaa-4e96-99f3-bccab710ad94 vivid360-block-card has-text-align-left hasBoxShadow card-basic full-page-width ml-0\" style=\"border-width:0px;border-style:;border-radius:0;color:#111 !important\"><div class=\"card-content\"><div class=\"card-content-wrap\"><div class=\"card-desc has-regular-font-size\">\n<div class=\"paragraph-wrapper\"><div class=\"_8ee3d5d9-f499-4af4-a4c6-d43b965473cf mt-0\" id=\"\"><p class=\"has-dark-text-color has-text-color\">Find out more about storage and handling.<\/p><\/div><\/div>\n\n\n\n<div style=\"background-color:transparent;--desktop-spacer:8px;--tablet-spacer:8px;--mobile-spacer:0px\" class=\"wp-block-vivid360-spacer vivid360-spacer-desktop vivid360-spacer-tablet vivid360-spacer-mobile\"><\/div>\n\n\n\n<div class=\"wp-block-vivid360-button-parent btn-block-container content-width button-justify-left\"><link rel='stylesheet' id='vivid360-button-block-css-css' href='https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/themes\/cex-wpvip-mhh-merck-vivid360-theme-1-12\/blocks\/button\/css\/style.min.css?ver=1766071753' media='all' \/>\n<link rel='stylesheet' id='vivid360-button-parent-block-css-css' href='https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/themes\/cex-wpvip-mhh-merck-vivid360-theme-1-12\/blocks\/button-parent\/css\/style.min.css?ver=6.8.5' media='all' \/>\n\n<div class=\"vivid360-button-block fullWidth-mobile\"><a class=\"btn primary primary-regular hoveredTextColor\" role=\"button\" style=\"font-size:14px;letter-spacing:0.86px;border-radius:4px;border-style:solid;justify-content:center;--hoverTextColor:#FFF;text-align:center;width:100%\" href=\"https:\/\/www.merckvaccines.com\/vaqta\/adult-storage-handling\/\" title=\"Review storage and handling\" target=\"_self\" rel=\"noopener\" data-design-category=\"button\" data-design-label=\"Review storage and handling\" data-design-module=\"element\" data-event-name=\"element_click\">Review storage and handling<\/a><\/div>\n<\/div>\n<\/div><\/div><\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n<div style=\"background-color:transparent;height:8px\" class=\"wp-block-vivid360-spacer vivid360-spacer spacer-8\"><\/div>\n\n\n<link rel='stylesheet' id='vivid360-separator-css-css' href='https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/themes\/cex-wpvip-mhh-merck-vivid360-theme-1-12\/blocks\/separator\/css\/style.min.css?ver=1766071753' media='all' \/>\n\n<hr class=\"wp-block-vivid360-separator has-text-color has-background has-light-gray-background-color has-light-gray-color desktopwidth mobileWidth\" style=\"height:0;--desktopwidth:1;--mobileWidth:1\"\/>\n\n\n\n<div style=\"background-color:transparent;height:8px\" class=\"wp-block-vivid360-spacer vivid360-spacer spacer-8\"><\/div>\n\n\n\n<div class=\"vivid360-heading\" id=\"ab389f3dd-ae98-48d5-8b7f-637fe18094f8\"><h4 class=\"content-width fontWeightRegular\" style=\"--desktopFontSize:var(--h4FontSizeDesktop);--tabletFontSize:var(--h4FontSizeDesktop);--mobileFontSize:var(--h4FontSizeMobile);--desktopLineHeightSize:var(--h4LineHeightDesktop);--tabletLineHeightSize:var(--h4LineHeightDesktop);--mobileLineHeightSize:\" id=\"\"><strong>Reference<\/strong><\/h4><\/div>\n\n\n\n<div style=\"background-color:transparent;height:8px\" class=\"wp-block-vivid360-spacer vivid360-spacer spacer-8\"><\/div>\n\n\n<link rel='stylesheet' id='vivid360-list-css-css' href='https:\/\/www.merckvaccines.com\/vaqta\/wp-content\/themes\/cex-wpvip-mhh-merck-vivid360-theme-1-12\/blocks\/list\/css\/style.min.css?ver=1766071753' media='all' \/>\n\n<div class=\"vivid-block-list content-width  block-233ab19a-7ea0-4712-ad49-72847eb395e4 bullets-bold\" data-image=\"\" data-image-mobile=\"\" data-image-all=\"\" data-image-all-mobile=\"\" data-icon-color=\"#333\" data-text-color=\"#333\" data-client-id=\"block-233ab19a-7ea0-4712-ad49-72847eb395e4\"><ol class=\"first-level default-order\"><li><em>Havrix.<\/em> Prescribing Information. GSK; 2024.<\/li><\/ol><\/div>\n\n\n\n<div style=\"background-color:transparent;height:8px\" class=\"wp-block-vivid360-spacer vivid360-spacer spacer-8\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Not shown actual size NDC 0006-4096-02 VAQTA offers a broader window for the 2nd dose *Havrix is a registered trademark of GSK&#8230;.<\/p>\n","protected":false},"author":709,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_trash_the_other_posts":false,"editor_notices":[],"footnotes":""},"ga4_page_audience":[795],"ga4_page_birn_id":[],"ga4_page_branding":[226],"ga4_page_businessunit":[234],"ga4_page_campaign":[],"ga4_page_content_purpose":[247],"ga4_page_customer_journey_stage":[295],"ga4_page_customer_specialty":[348],"ga4_page_experience":[],"ga4_page_indication":[405],"ga4_page_material_intent":[481],"ga4_page_product":[621],"ga4_page_region":[708],"ga4_page_therapeuticarea":[724],"class_list":["post-111","page","type-page","status-publish"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Adult Dosing Schedule for VAQTA\u00ae (Hepatitis A Vaccine, Inactivated)<\/title>\n<meta name=\"description\" content=\"Find the adult dosing 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